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Composite hemp felt

A hemp felt and hemp fiber technology is applied in the field of sound insulation and heat insulation composite materials for automobile interiors, which can solve the problems of unreachable odor indicators, materials that are not easily degraded, and complicated processes, so as to achieve superior physical and mechanical properties of products and better molding effects. good effect

Inactive Publication Date: 2013-08-21
INTERIOR DECORATION MATERIALS CO LTD ZHENJIANGTONGDA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these materials have the characteristics of sound insulation, heat insulation, shock absorption, stable size and surface after molding, and good rigidity, they have the problems of heavy weight, cumbersome assembly, complicated process, and difficult degradation of materials. Less than the current international advanced standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] A composite hemp felt, which is composed of 45% to 35% of hemp fiber, 40% to 45% of low melting point fiber, and 15% to 20% of polyester fiber. The manufacturing steps are as follows:

[0009] (1) Modified pretreatment of cut hemp

[0010] Hemp fiber is composed of cellulose, hemicellulose, lignin, pectin, fat and wax, minerals and other substances. On the one hand, it has the advantages of good moisture absorption and heat dissipation performance, strong wear resistance, high specific strength and specific modulus, etc. On the other hand, it has the disadvantages of rough hand feeling, brittle fracture, and poor cohesion. The single fiber of hemp is relatively short, and generally a large number of single fibers rely on the colloid in the fiber to bond together to form fiber bundles with a certain length and strength, and the fiber lignin content is high, resulting in rough and hard fibers. The above disadvantages determine the poor spinnability of hemp fiber.

[001...

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PUM

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Abstract

The present invention discloses a composite hemp felt, and belongs to the technical field of vehicle interior decoration materials. The composite hemp felt comprises, by weight, 45-35% of hemp fibers, 40-45% of low-melting point fibers, and 15-20% of polyester fibers. According to the composite hemp felt, a new process technology is adopted to carry out a modification pretreatment on biological nature hemp fibers of the main material, the material has characteristics of sound insulation, noise reduction, light weight, no odor, no toxicity, and capability of biodegradation, recovery and recycling, a forming effect is excellent, physical and mechanical properties of the product are excellent, odor Indicators meet MS361-15 standard requirements, hazardous material indicators meet vehicle industry standards, and design requirements of modern vehicle manufacturers are completely met. According to the present invention, with the further improvement, the upper surface and the lower surface of the composite hemp felt respectively are a composite high density PP mesh woven cloth and an anti-adhesion fabric, wherein the composite high density PP mesh woven cloth and the polyester fibers are regeneration materials so as to achieve material recycling and provide new use values for the waste material.

Description

[0001] technical field [0002] The invention belongs to the technical field of automobile interior decoration materials, and in particular relates to a sound-insulating and heat-insulating composite material for automobile interior decoration. Background technique [0003] The sound insulation and heat insulation pads in the automotive interior products all require the harmful substance content, odor, sound insulation and other indicators of the materials to meet the manufacturer's, national or international standards, and most of the materials produced by the current automotive interior manufacturers are: phenolic resin Felt, rock wool, EVA, glass fiber wool, foaming materials, etc. single or superimposed, the composition method is phenolic resin felt plus fabric, polyurethane foam plus glass fiber surface layer composite, phenolic resin felt plus rock wool felt composite, EVA+polyurethane Foam compound. Although these materials have the characteristics of sound insulatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/08
Inventor 郭娟许美庆高坤
Owner INTERIOR DECORATION MATERIALS CO LTD ZHENJIANGTONGDA